BTW, Can I read the OD at 570 nm instead of 575 nm?
On 25 Jun 1998, jian cao wrote:
> For your information, the color changes form yellow to "brick red" in
> this lacZ assay using CPRG as a substrate. You can read the color at
>> Q. Guo wrote in message ...
>> >Has anybody worked on liquid beta-galactosidase assay with CPRG instead of
> >ONPG? What kind of color that going to be? Is it from yellow to red?
> >I am working on a cDNA library screening with yeast two hybird system.
> >Thank you